Question

To synthesise 1.0 mole of 2-methylpropan-2-ol from Ethylethanoate ______ equivalents of CH₃MgBr reagent will be required. (Integer value)

विकल्प

• 5

• 7

• 9

• 2

Answer 1

To synthesise 1.0 mole of 2-methylpropan-2-ol from Ethylethanoate 2 equivalents of CH₃MgBr reagent will be required.

Explanation:

The ethyl ethanoate reacts with 1 mole of CH₃MgBr, Grignard reagent to acetone and ethanol. The Grignard reagent attaches carbonyl C in ethyl ethanoate and simultaneous breaking of the second oxygen atom from the ester occurs.

The second mole of Grignard reagent combines with acetone in the following step, attacking the carbonyl C atom and causing an addition reaction to create an adduct. Further hydrolysis of the adduct results in 2-methylpropan-2-ol.